Some attribute Usain Bolt’s speed to his extraordinary physique. Others to his
dedication and training. He himself credited his London Olympics victory to
receiving an inspirational picture of his girlfriend’s bottom. Could it just
be, though, that he has very symmetrical knees?

It sounds like the sort of attribute that might produce some success in a
1950s Butlins talent show, but offer less of an edge in the Olympics. A team
of scientists believe, however, that the key to sprinting could be all in
the similarity of your kneecaps.

Researchers from the University of Northumbria in Newcastle came to the